Method and machine for making paper



V c. E. POPE.

METHOD AND MACHINE FOR MAKING PAPER.

APPLICATION FILED MAR. 26,1918.

Patented Dec. 30, 1919.

2 SHEETSSHEET l.

C. E. POPE.

METHOD AND MACHINE FOR MAKING PAPER.

APPLICATION FILED MAR. 25, 1918.

Patented Dec. 30,1919.

2 SHEETSSHEET 2- ,Zivven $02,

a? *1 of? B\- UNITED STATES PATENT OFFICE.

I CHARLES E. POPE, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO GREAT NORTHERN PAPER COMPANY, OF MILLINOCKET, MAINE, A CORPORATION OF MAINE.

METHOD AND MACHINE FOR MAKING PAPER.

Specification of Letters Patent.

Patented Dec. 30, 1919.

Application filed March 26, 1918. Serial No. 224,746.

Springfield, in the county of Hampden and I State of lVIassachusetts, have invented an Improvement in Methods and Machines for Making Paper, of which the following is a specification.

This invention consists of a process and machine for carrying the paper from the drying rolls to and through the ealenders of a paper making machine which is substan-- tially automatic. It is in part an improvement on the arrangement described and claimed in my Patent No. 992,688 of May 16, 1911, for carrying the paper automatically from the driers to the ealenders. As a part of my in'iprovement an opposed air blast is used which is claimed broadly in connection with my pending application Serial No. 222,467, filed March 14, 1918.

Figure 1 shows a perspective view of my invention and Fig, 2 a side View, certain well. known parts not relating to this particular invention being omitted. v

Fig. 3 shows the opposed air blasts as applied to the doctor 16, and Fig. 4; shows the arrangement of air blasts as applied to the doctor 30.

When the paper is first threaded through the machine on starting, or after a break, the front end of the paper emerges from between the last drier D and the usual felt through the calenders.

When the formation of the sheet is satisfactory and it is desired to carry the sheet over tothe ealendcrs, I form a narrow lead strip '3, preferably about 6 inches wide, from the full sheet, and carry this strip over and through the (-alenders as herein described. Later I broaden out this narrow lead strip, until the whole width of sheet is passing The operation of this device will readily be understood by an examination of the drawings, in connection with the following description:

The full width sheet 1, coming from the upper drier D,- passes directly downward through an opening in the floor not shown. hen this sheet is satisfactorily formed, a lead strip 3 is formed from it in the followmg manner:

A rod 4: is passed throughsui'table bearings, attached to any suitable part of the machine or other support. This rod 1 has a handle 6, extending outside the line of the driers and the rod is long enough so that it may be pushed entirely across the machine. At the other side of the bearing 5 from the handle, the rod has attached a knife 7. Al though the lead strip former may be located near any of the drying rolls, I preferably arrange it, near the path of the sheet of paper before it passes to the last drier for instance between drier B and C so that by turning the handle 6 the knife 7 will be forced against the paper passing from drier 'B to drier C and so before it comes td the .last drier at any desired point in the width of the paper sheet. In practice I prefer to cut the paper at a point about six inches from the edge of the paper sheet. This lead strip 3 thcnpasses along like the rest of the paper sheet 1 through the opening in the floor to waste. The knife is left in position continuously cutting the paper to form this lead strip until the operation of carrying over the lead strip through the calenders is successfully performed.

In order to carry this lead strip from the last drier to the calenders, I arrange a doctor 9, preferably running the entire width of the drier which detaches the sheet of paper, including the .leadstrip from the drier D, and leads it to waste as long as desired. This doctor 9 has associated with it an air passage or series ofair passages 10, here shown as passing directly throughthe doctor at the end where the lead strip is formed,the force of which carries the lead strip along as hereinafter described.

In order to bridge the gap between the last drier and the calendei's, I arrange a series of guide rolls 11, 12, 13 and 14, one of which is a driving roll for driving and guiding a felt 15. The roller 12 is placed close to the drier D at the point where it is desired that the paper shall leave the dries and-may have the usual tension, device and the felt 15 passes from the roller 12 to a roller 11, placed near and somewhat above the line of the second and third calender rolls, counting from the top, between which the paper is first to pass to be calendered. From the roll 11 the felt passes around a roller 14, by which its tension may be adjusted, and a roller 13 above a drier D, from which the felt 15 passes in contact with the paper sheet being led through the last drier. Below the roller 11 and in contact with the felt is placed a doctor 16, preferably of metal to remove the paper sheet from the felt.

hen the lead strip 3 has been formed and everything is ready to pass it over to the calenders, the air blast is turned on through the air passage 10 and the lead strip blown outwardly from the drier into contact with the felt 15, which, in conjunction with the air blast from the passages 10 carries the lead strip along toward the roller 11. The static electricity usually present also assists. The nozzles 17 of an air blast, described and claimed in my application, Serial No. 222,467, filed March 1 L, 1918, are

. arranged at one end of the doctor 16 and the air blast directed through these nozzles 17 detaches the lead strip from the doctor, so that the lead strip passes between the rolls 30 and 31 of the calender stack.

Each of the calender rolls 30 to 35, inclusive, is provided with a doctor 30, 31 32, 33 34, and 35, (having if desired down wardly projecting arms, as 31 to detach the paper sheet from the rolls if it should adhere to a roll beyond its point of contact with the next lower roll, and to direct it into contact so as to pass between the calenders beneath. An air passage, as 31, is provided for each of the doctors 31 to 35 inclusive, to detach the lead strip from the doctor and direct it to the next lower roll.

I prefer to use two blasts directed as shown by the dotted line, Fig. 2, which impinge on the calender roll near the point of detachment of the paper from the calender and push the paper downward, but any air blast may be used which will clear the paper from the doctor, and not interfere with the 'progress of the paper if this feature of my invention is not desired or none at all. 1L find however, that the air blast placed as described is very useful.

The doctor 36 for the roll 36 preferably lacks the downward arm as 31 of the other doctors, as such arm might interfere with the passage of the paper to the reel, not described. An air passage 36, however, is provided, which serves to direct the paper sheet to the roll 37. I prefer to extend this air passage entirely across the machine. The roll 37 is provided with a doctor 37*, and aperforated pipe, 37". extends substantially across the roll at the back edge of the doctor and serves to initially direct the paper sheet from said doctor to reel 39. Until after the lead strip 3- has been satisfactorily led through the calenders the main body of the sheet is permitted to pass through the floor into the waste pit and the lead strip is allowed to run to waste over the'doctor 37 at the end of the calender stack. lead strip is running through the calender satisfactorily, it is broadened by pressing the rOCl 4 inward until the entire sheet is passing through the calenders and to waste over the doctor 37 The paper is then carried to the reel in any suitable manner, as by hand or as described in my Patent No. 1,2485%, of December 4:, 1917, or otherwise.

It. will be apparent from the foregoing description that the operation of my invention is as follows:

The paper sheet is passed through the driers in the usual way until a sheet of the entire width, properly formed, is passing from the doctor 9 to waste. Thereupon the operator turns the handle 6, pressing the knife 7 against the sheet at a point about (3 inches from its edge, so that the lead strip 3 is separated from the remainder of the sheet and the lead strip and the remainder of the sheet continues to pass to waste as before. Air is now turned on through the passages 10 through the doctor 9 and the lead strip 3 is broken b, the air blast and its end portion carriec by the air blast and the felt to the doctor 16. Before the end strip reaches the doctor 16 the air is turned through the air passages 17 and the opposed air blast thus formed lifts the paper from the felt and causes it to pass between the calenders 30 and 31. Meanwhile, air has been turned through the air passages in the various doctors 30 to 36, inclusive, and the sheet guided by the doctors and the air threads itself without intervention of the operator through the calenders from top to bottom and passes to waste over the doctor 37*. When the lead strip is running through the calenders satisfactorily the rod sf is pushed inwardly and the width of the lead strip is increased until the remainder of the strip has been completely incorporated with When the the lead strip, so that the entire sheet is passing over,the doctor 37. The paper is then ready to be carried to the reel.

In the foregoing description I have assumed that the full sheet will be carried through the driers before the lead strip is carried to the calenders, as is the present usual practice in paper mills. but it is my preferred practiceto take the lead strip directly as it passes through the driers from the felts and carry it to the calenders without theintermediate carryin;: of the full width of the sheet through the driers. It is obvious that there is a great saving in waste by this practice. The use of the knife 7 will be unnecessary if only a lead strip is running through the driers when the paper is carried over, but this knife should be available because in case of a break after the paper has left the driers, it is convenient to have mechanical means for forming an end strip,'rather than to attempt to form it byhand,

In this specification I have described the dersf by hand there i dange'nthat employees will lose theirlfinge sworhands by catehing them in the calenders. Prior to my invention, mechanical guiding strips havebeen placec'l-t'odirect the course of the paper from the bite; e'calender to the bite below, but such. ingmeans are harmful rather than helpfuljat the higlrspeed at which my mach-ines operate and it is a valuable feature of my invention to do away entirely with the use of such guiding strips, which are likely tov clogthe progress of the paper, replacing them by the air blast directed to impinge 011 the upper roll and lead the paper against the lower calender without any possible clogging effect.

I claim: I

1. The combination with the driers and alenders of a paper-making machine of means arranged to form a lead strip separated from the paper sheet at a point prior to the passage of the paper sheet around the last drier and to broaden said strip as desired, means arranged to remove the paper from the last drier and direct it to a traveling felt, a traveling felt arranged to receive arranged to guide the paper strip through the calenders substantially as described.

The combination with the driers and 'calenders of a paper-making machine of an.

, endless felt arranged between the last drier and the calenders and means for causing the lowersurface of the felt to travel from a point adjacent the last drier to a point adjacent the first pass of the paper between the calenders, pneumatic means to transfer a lead strip from the last drier to the traveling felt, pneumatic means for transferring the lead strip from the traveling felt to the first pass between the calenders, scrapers to remove the paper-from each calender after fini hing its pressure by the same, and an lower calender, and pneumatic means for blowing the paper sheet from the last calender to the reel.

3.. The combination with the driers and calenders of a paper-making machine of an endless felt arranged between the last drier and the calenders and means for causing the lower surface of the felt to travel from a point adjacent the last drier to a point adjacent the first. pass of the paper between the ealenders, pneumatic means to transfer a lead strip from the last drier to the travel ing felt, pneumatic means for transferring the lead strip from'the traveling felt-to the first pass between the calenders. sc 'apers to remove the paper from each calender after finishing its pressure by the same, and an' air blast impinging on the calender from which the paper is to be removed, and guiding the paper into cont-act with the next lower calender. i

a. The combination with the driers and calenders of a paper-making machine of means arranged to form alead strip separated from the remainder of the paper sheet and broaden the same as desired, an endless felt arranged between the last drier and the calenders and means for causing the lower surface of the felt to travel from a point adjacent the last drier to a point adjacent the first pass of the paper between the calenders, pneumatic means to transfer a lead strip from the last drier'to the traveling felt, pneumatic means for transferring the lead strip from the traveling felt to the first pass between the calenders, scrapers to re move the paper from each calender after finishing its pressure by the same, and an air blast impingingon the calender from which the paper is to be removed, and guiding the paper into contact with the next lower calender.

5. The combination with the driers and calenders of a paper-making machine of means arranged to form a lead strip sepa' arated from the remainder of the paper sheet and broaden the same as desired, arr-endless felt. arranged between the last drier and the calenders and means for causing the lower surface of the felt to travel from a, point ad acent the last drier to a point ad jacent the first pass of the paper between the calenders, pneumatic means to transfer a lead strip from the last drier to the traveling felt, pneumatic means for transferring the lead strip from the traveling felt to the first pass between the ealenders, scrapers to' remove the paper from' each calender after finishing its pressure by the same, and an air blast impinging on the calender from which the paper is to he ren'ioved, and guiding the paper into contact withthe next.

lower calender, and pneumatic means for blowing the paper sheet from the last calender to the reel.

6. The combination with the driers and calenders of a papermaking machine of an endless felt arranged between the last drier and the calenders and means for causing the lower surface of the felt to travel from a point adjacent the last drier to a point adjacent the first pass of the paper between the calenders, pneumatic means to transfer a lead strip from the last drier to the traveling felt, pneumatic means consisting of opposed air blasts for transferring the lead strip from the traveling felt to the first pass between the calenders, scrapers to remove the paper from each calender after finishing its pressure by the same, and an air blast impinging on the calender from which the paper is to be removed, and guiding the paper into contact with the next lower calender.

7. The combination with the driers and calenders of a paper-making machine of means arranged to form a lead strip separated from the remainder of the paper sheet and broaden the same as desired, an endless felt arranged between the last drier and the calenders and means for ausing the lower surface of the felt to travel from a point adjacent the last drier to apoint adjacent the first pass of the paper between the calenders, pneumatic means to transfer a lead strip from the last drier to the traveling felt, pneumatic means consisting of opposed air blasts for transferring the lead strip.

from the traveling felt to the first pass between the calenders, scrapers to remove-the paper from each calender after finishing its pressure by the same, and an air blast iminging on the calender from which the paper is to be removed, and guiding the paper into contact with the next lower calender.

S. The method of carrying the paper over from the driers of a paper-makingmachine to and through the'calenders, which consists in passing the entire width of the paper sheet through the driers to waste, then forming a narrow lead strip from the remainder at a point prior to its passage over the last drier, then removing the lead strip from the last drier and blowing it against guiding and carrying means which carry it adjacent to the alenders, then removing it by opposed air blasts from the said carrying means and directing it so that it passes to the calenders and removing it from each calender roll and blowing it to the next bite and then broadening out the lead strip to include the entire width of the paper.

9. The method of carrying the paper over from the driers of a paper-making machine to and through the calenders, which consists in passing the entire width of the paper sheet through the driers to waste, then forming a narrosv lead strip from the remainder at a point prior to its passage over the last drier, then removing the lead strip from the last drier and blowing it against guiding and carrying means which carry it adjacent to the calenders, then removing it by blowing from the said carrying means and directing it so that it passes to the calenders and removing it from each cal.- ender roll and blowing it to the next bite and then broadening out the lead strip to include the entire width of the paper.

10. The combination with the driers and calenders of a paper-making machine, of means for taking over the paper sheet from the last drier to the calenders consisting of an endless traveling felt and pneumatic means for causing the paper to pass to the felt and adhere there by means of a static charge of electricity carried by the paper, and pneumatic means to detach the sheet from the felt and pass'it to the calenders.

11. The combination with the drier and calenders of a paper-making machine, of a traveling felt in contact with the last drier and extended in proximity to the calender stack to transfer the paper sheet fronrthe driers to the calenders.

12. The combination with the driers and calenders of a paper-making machine, of means to form a lead strip prior to the last drier and to broaden said strip to the full paper sheet, means to transfer said lead strip from the last drier to a point adjacent the calenders and means to direct it into "and through said calenders.

- 13. In combination with the calenders of apaper machine a doctor, arranged to strip th paper from an upper calender and an air passage arrangedto direct air against such upper calender roll beneath the point of contact of. said doctor therewith, so as to impinge on said roll and be directed against the paper passing between such upper calender and the lext lower calender and press the paper against the same.

14. In combination with calenders of a papermachine a doctor, arranged to strip the paper from an upper calender and an air passage arranged to direct air substantially horizontally against such upper calender roll beneath the point of contact of said doctor therewith, so as to impinge on said roll and be directed against the paper passing between such upper calender and the next lower calender and press the paper against the same.

15. In combination with calenders of a paper machine a doctor, arranged to strip the paper from an upper calender and an air passage arranged to direct air against such upper calender roll beneath the point of contact of said doctor therewith, so as to ,ender and the next lower calen 5 press the paper against the same, and an unobstructed space beneath said doctor for the i I impinge on said roll and be directed against th paper passing between such upper caler and passa of the air and paper. 4

16. n combination with the calendars of a paper'inachine a doctor, arranged to strip the paper from an upper calender andan airpassage arranged" to direct air substanv -tially horizontal against such upper cal-' ender roll beneath the point of contact of said doctor therewith, so as to impinge 1'5- papers passing between such upper calenoii. said roll and be directed against the der andthe next lower calender and press the paper. against the same, and Jan unobstructed s ace beneath said doctor for the passage 0 the air and paper.

.17. The method of carrying the paper through the calenders of a papermakmg machine which consists in directing a owerful current of air substantially horlzonpaper against the next lower roll.

In testimony whereof, I have signed my 'name to this specification.

. CHARLES Ei Porn 

